Android/iOS: Nike released its popular Nike+ Running app on Android yesterday, and issued a major update to iOS, which includes the usual bugfixes and a major UI overhaul.

We've talked about Nike+ before, and while we don't love it quite as much as we love RunKeeper, it's still a solid fitness-tracking app. The new Nike+ 4.0 update comes with Facebook integration for sharing run data with your friends and the ability to start a run from anywhere in the app, as well as comparing your last run with previous ones. There's also a brand new feature called "shoe tagging" that lets you track your shoes' mileage and find out when it's time to buy a new pair.

iOS only: Nike+, the popular run tracking system that utilizes an iPhone/iPod touch and a sensor…
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Nike+ Running is a free app available now in the Google Play store and the iTunes App Store. There's a ton of stuff in this update, so hit the link below to read more, or check out the video above to see some of the new improvements.